[Etoys] etoys performance problems

[Yoshiki Ohshima]

  Hilaire,

> To be accurate, what happen if one drag and drop a jpeg file in an
> image, then save a project file, move the project in another computer
> without the original jpeg file? Is the jpeg file saved in the .pr zip
> file as well?

  Currently, it forgets the original format and all are treated as the
same Form.

  I contemplated that we can keep the original format, and if it was
JPEG, we could even keep the original bytes of JPEG data.  The catch
is that if the user painted on the Sketch created from JPEG,
determining whether to make sense to store the result in JPEG or not
is not trivial.

-- Yoshiki